A JEALOUS 19-year-old girl attacked her friend when she kept refusing to spend time with her after starting a romance with a boy, the District Court heard yesterday. Mok Man-wai, 19, pleaded guilty to a count each of wounding and assault occasioning actual bodily harm. Prosecutor Melville Boase said Mok and So Wai-ling, 16, became close friends and often spent time together after meeting in June 1991. But despite Mok's requests, the girls rarely went out after Wai-ling found a boyfriend in September 1992. On November 16, Mok went to Wai-ling's home in Lok Wah Estate to ask for the return of her pager, Mr Boarse said. Each time she had attempted to meet Wai-ling, the younger girl had gone to stay with her boyfriend, and Mok scolded her about it over the telephone. A week later, Mok waited near Wai-ling's ninth-floor flat and rushed out from a nearby staircase when the younger girl returned, the court heard. Mok, armed with a machete wrapped in newspaper, attacked Wai-ling when she refused to go downstairs for a ''talk''. Wai-ling's brother, So Yau-wing, 21, alerted by the noise, came out to separate the two and tried to persuade Mok to leave. Mok then hit Wai-ling again with the knife, cutting her on the left shoulder, and after tearing away the wrapping, chopped Mr So. He managed to dodge away, but received a long cut on his right thigh. Mok had fled but was arrested four days later when the victims' father bumped into her in a restaurant. Under caution, Mok said she chopped Wai-ling's brother out of anger because he was ''too nosy''. Defence solicitor Duncan Fung said Mok had been sent to a drug addiction treatment centre in March for a drug offence. Judge Kilgour called for reports on Mok and adjourned sentencing until August 17.